Question

$(2 \sqrt{7 } + 3 \sqrt{5} (2 \sqrt{7 } - 3 \sqrt{5)}$

Answer 1

ans=(2√7+3√5)(2√7-3√5)
4×7-3×5
28-15
ans=13

Answer 2

Heya!!! User!!! ✌

Here's your answer friend,

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==> (2√7 + 3√5)(2√7 - 3√5)

==> Therefore, by using the { (a + b)(a - b) = a² - b² } identity

we have,

==> {(2√7 + 3√5)(2√7 - 3√5)}

==> {(2√7)² - (3√5)²}

==> {28 - 45}

==> -17

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Is the required answer.

HOPE IT HELPS YOU :)

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